I guess most people know, but main appeal here is the long-term software support provided in https://www.raspbian.org/ courtesy of 'Raspberry PI (Trading) limited'.
Are there any benefits in using Raspberry Pi OS (the continuation of Raspbian), over unmodified Debian? Are the support windows different?
The Debian images (https://raspi.debian.net/) haven't been updated recently and don't support the Pi 5 at all. And support for other hardware is inconsistent.